他很好只是我不配
[tā hĕn hăo zhĭ shì wŏ bù pèi]
This sentence means 'He's good (perfect/ nice), but I am not worthy of him.' This implies that while the user highly values someone (often romantic interests are assumed here due to usage in social media), they feel inadequate for some reason, maybe reflecting some inner struggles like low self-confidence.